EP0719680A1 - Key activated air bag disabling system - Google Patents
Key activated air bag disabling system Download PDFInfo
- Publication number
- EP0719680A1 EP0719680A1 EP95308470A EP95308470A EP0719680A1 EP 0719680 A1 EP0719680 A1 EP 0719680A1 EP 95308470 A EP95308470 A EP 95308470A EP 95308470 A EP95308470 A EP 95308470A EP 0719680 A1 EP0719680 A1 EP 0719680A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air bag
- disabling system
- key
- vehicle
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
- B60R21/01566—Devices for warning or indicating mode of inhibition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
- B60R21/01564—Manually or key-actuated inhibition switches
Definitions
- the present invention relates generally to automotive vehicle occupant restraint systems, particularly air bags. More specifically, the invention relates to mechanisms for selectively disabling such systems.
- the present invention provides an air bag disabling system for an automotive vehicle as hereinafter set forth in Claim 1 of the appended claims.
- the key cylinder is operable only by a key having certain bits in common with the ignition key of the vehicle.
- an instrument panel 10 of an automotive vehicle is illustrated as including a main body portion 12 having a centre section 14 in which is mounted an air bag disabling system 16.
- the embodiments of Figure 1 and 2 differ in that the instrument panel 10 of the Figure 1 embodiment includes the air bag disabling system module 16 mounted directly into the main body portion 12.
- the Figure 2 embodiment illustrates an instrument panel 18 having a main body portion 20 and an air bag disabling system module 22 is positioned to suspend below the main body portion 20.
- a key cylinder 24 and a signal light 26 whose arrangement can best be seen in Figure 3.
- a housing 28 is inserted into and is mounted in the instrument panel main body portion 12, 20.
- the key cylinder presents a bezel portion 30 outwardly of the instrument panel 10, 12 and the bezel portion 30 is fixedly mounted against the housing 28.
- a key cylinder assembly 32 is rotatably mounted within the bezel 30, presenting a key slot 34 externally of the instrument panel 10, 12.
- the key cylinder 32 and bezel 30 may be of substantially conventional designs, which will typically include an actuating portion 36 rotatably movable upon insertion of a key 38 into the key slot 34 and rotation thereof in known lock and key manner.
- the key 38 is preferably of conventional design having a plurality of bits 40 for engagement with actuating pins or other similar mechanisms within the key cylinder 32 to effect rotation of the actuating portion 36. It is, of course, well known to form such keys and to use such keys for ignition keys in automotive vehicles. It is preferred in the disabling system module of the present invention that the lock cylinder 32 be configured to operatively engage with certain of the bits 40 which are common to all keys of a particular automotive vehicle manufacturer. Alternatively, the key cylinder 32 can be configured in a known manner to accept a key 38 only identical in configuration to that required for the ignition key of the vehicle in which the disabling system module 16, 22 is installed.
- the key 38 upon insertion into the key slot 34, permits movement between the first position labelled "ON” in Figure 3 and the second position labelled "OFF", displaced therefrom in a clockwise direction.
- the ON position corresponds to a position in which an air bag system may be activated.
- the OFF position corresponds to a position in which the air bag system may not be activated.
- the key slot 34 aligns with the signal light 26 when in the OFF position, and as will be later described, the signal light is lit when it is in a position to give an indication that the air bag system is disabled.
- the disabling system modules 16, 22 are best utilised in automotive vehicles that have air bag systems installed in at least two seating positions in the front seat of a vehicle in juxtaposition with an instrument panel such as the instrument panels 10, 18.
- air bags would be installed in the vehicle steering wheels (not shown) on the left side of the instrument panel 10, 18, and in the passenger positions 42, 44 on the right side of the instrument panels 10, 18, respectively.
- the disabling systems 16, 22 may be actuated by turning the key 40 to the OFF position shown.
- One exemplary use is the disabling of the air bag system in situations in which an infant in a rear facing seat is placed in the passenger position. For some configurations of seat and air bag, it may be undesirable to permit air bag activation during emergency situations.
- the key cylinder 32 is operatively connected in a mechanical fashion to a circuit indicated at 46 in Figure 5 for electrically interconnecting the passenger air bag 42, 44 indicated diagrammatically as a resistive load 48 and a source of electrical power 50 in the vehicle.
- a switch 52 in the position shown in Figure 5, operates to conduct power from the vehicle electrical power source 50 to the air bag 48 when either of a pair of primary sensors 54, 56 and an auxiliary safing sensor 58 are closed.
- the sensors 54, 56, 58 are acceleration sensors mounted in the vehicle to sense decelerations representative of collision effected decelerations above a certain magnitude.
- the key 38 Upon rotating the key 38 from the ON position to the OFF position, the key 38, which includes a flat sided handle portion 60, aligns to point at the signal lamp 26.
- the actuator portion 36 of the key cylinder 32 includes an operating tab 62 which interacts with the switch 52 to move it from the position shown in Figure 5 to its alternative position in which electrical power from the vehicle electrical system 50 is supplied to the signal lamp 26 and through a fuse 64 and a resistive test load 66 arranged in parallel with the air bag 48 and connection is broken between the power source 50 and air bag 48.
- the resistive test load 66 simulates the air bag 48 and permits continuing operation of diagnostics at low power.
- the fuse 64 is sized to disconnect upon application of power at the level that the air bag system utilised to activate the air bag 48.
- the controlling of the two power levels as a function of the diagnostic and firing circuit of the automotive vehicle is not part of the present invention. It should be understood, however, that the diagnostic operation typically takes place under influence of a current of about 150 mA while the firing operation is effected through passing a current of approximately 5 amps in the preferred air bag system.
- the fuse 64 acts as a memory so that if a collision has occurred which effects closure of sensors 54 or 56 and 58, the fuse will operate to open the circuit, and it can be readily detected that the switch 52 was in the OFF position during the event.
Abstract
Description
- The present invention relates generally to automotive vehicle occupant restraint systems, particularly air bags. More specifically, the invention relates to mechanisms for selectively disabling such systems.
- Since inflatable occupant restraint systems or air bag systems have come into widespread use in the automotive industry, it has been observed that there are certain instances in which it may be desirable to disable operation of the air bag system in a vehicle during the period in which the vehicle is in use. One such instance is when a vehicle has air bags for both the driver and passenger positions and a rear facing infant seat is placed in the passenger position and is not properly positioned for use with the air bag. Since practically all air bag systems currently in use are activated by transmitting an electrical signal powered by the vehicle electrical system to an igniting device in the air bag system, it has been suggested to provide switching to effect disabling of the air bag system on a selective basis. U.S. Patents 5,324,074; 5,234,228; and 5,161,820 are examples of such approaches.
- Certain disadvantages, however, are noted in the prior art disabling systems. These disadvantages arise from the appropriate desire of the designer of the occupant restraint system to ensure that because of the inherent normal benefit of having the air bag system operating, the disabling takes place only when intended and only under the control of the operator of the vehicle. It is also desired that the reliability and efficacy of this disabling device be monitored during a vehicle operating event which might normally give rise to operation of the air bag disabled by the disabling system. None of the prior art devices provide such advantages.
- With a view to mitigating the disadvantages of the prior art, the present invention provides an air bag disabling system for an automotive vehicle as hereinafter set forth in
Claim 1 of the appended claims. - In the preferred embodiment of the invention, the key cylinder is operable only by a key having certain bits in common with the ignition key of the vehicle.
- The invention will now be described further, by way of example, with reference to the accompanying drawings, in which:
- Figure 1 is an elevation view of an automotive instrument panel illustrating installation of an air bag disabling system according to the present invention;
- Figure 2 is a view similar to Figure 1 illustrating an alternative embodiment for installation of the air bag disabling system;
- Figure 3 is an exploded view of the key and key cylinder of the invention air bag disabling system;
- Figure 4 is an enlarged elevation view of the exterior surfaces of the air bag disabling system presented to the outside of the instrument panel; and
- Figure 5 is an electrical schematic of the air bag disabling system according to the present invention.
- Turning now to Figures 1 and 2, an
instrument panel 10 of an automotive vehicle is illustrated as including amain body portion 12 having acentre section 14 in which is mounted an air bag disabling system 16. The embodiments of Figure 1 and 2 differ in that theinstrument panel 10 of the Figure 1 embodiment includes the air bag disabling system module 16 mounted directly into themain body portion 12. On the other hand, the Figure 2 embodiment illustrates aninstrument panel 18 having amain body portion 20 and an air bag disablingsystem module 22 is positioned to suspend below themain body portion 20. - Common to both the
modules 16 and 22 are akey cylinder 24 and asignal light 26 whose arrangement can best be seen in Figure 3. In each of themodules 16, 22, ahousing 28 is inserted into and is mounted in the instrument panelmain body portion bezel portion 30 outwardly of theinstrument panel bezel portion 30 is fixedly mounted against thehousing 28. As may best be seen in Figure 4, akey cylinder assembly 32 is rotatably mounted within thebezel 30, presenting a key slot 34 externally of theinstrument panel key cylinder 32 andbezel 30 may be of substantially conventional designs, which will typically include an actuating portion 36 rotatably movable upon insertion of akey 38 into the key slot 34 and rotation thereof in known lock and key manner. Thekey 38 is preferably of conventional design having a plurality of bits 40 for engagement with actuating pins or other similar mechanisms within thekey cylinder 32 to effect rotation of the actuating portion 36. It is, of course, well known to form such keys and to use such keys for ignition keys in automotive vehicles. It is preferred in the disabling system module of the present invention that thelock cylinder 32 be configured to operatively engage with certain of the bits 40 which are common to all keys of a particular automotive vehicle manufacturer. Alternatively, thekey cylinder 32 can be configured in a known manner to accept akey 38 only identical in configuration to that required for the ignition key of the vehicle in which the disablingsystem module 16, 22 is installed. - The
key 38, upon insertion into the key slot 34, permits movement between the first position labelled "ON" in Figure 3 and the second position labelled "OFF", displaced therefrom in a clockwise direction. The ON position corresponds to a position in which an air bag system may be activated. The OFF position corresponds to a position in which the air bag system may not be activated. It will be noted that the key slot 34 aligns with thesignal light 26 when in the OFF position, and as will be later described, the signal light is lit when it is in a position to give an indication that the air bag system is disabled. - It is contemplated that the disabling
system modules 16, 22 are best utilised in automotive vehicles that have air bag systems installed in at least two seating positions in the front seat of a vehicle in juxtaposition with an instrument panel such as theinstrument panels instrument panel passenger positions 42, 44 on the right side of theinstrument panels air bags 42, 44 is unoccupied or is occupied by persons or things for which operation of the air bag system is not desired, thedisabling systems 16, 22 may be actuated by turning the key 40 to the OFF position shown. One exemplary use is the disabling of the air bag system in situations in which an infant in a rear facing seat is placed in the passenger position. For some configurations of seat and air bag, it may be undesirable to permit air bag activation during emergency situations. - The
key cylinder 32 is operatively connected in a mechanical fashion to a circuit indicated at 46 in Figure 5 for electrically interconnecting thepassenger air bag 42, 44 indicated diagrammatically as a resistive load 48 and a source ofelectrical power 50 in the vehicle. During normal operation of a vehicle, a switch 52, in the position shown in Figure 5, operates to conduct power from the vehicleelectrical power source 50 to the air bag 48 when either of a pair ofprimary sensors 54, 56 and anauxiliary safing sensor 58 are closed. Thesensors - It is also known to apply low power to the air bag 48 to test the integrity of the
air bag systems 42, 44. The circuit diagnosis effected during such operation makes use of the resistance of certain of air bag electrical components, as represented diagrammatically at 48. - Upon rotating the
key 38 from the ON position to the OFF position, thekey 38, which includes a flatsided handle portion 60, aligns to point at thesignal lamp 26. The actuator portion 36 of thekey cylinder 32 includes anoperating tab 62 which interacts with the switch 52 to move it from the position shown in Figure 5 to its alternative position in which electrical power from the vehicleelectrical system 50 is supplied to thesignal lamp 26 and through a fuse 64 and aresistive test load 66 arranged in parallel with the air bag 48 and connection is broken between thepower source 50 and air bag 48. Theresistive test load 66 simulates the air bag 48 and permits continuing operation of diagnostics at low power. Upon sensing through operation of thesensors system module 16, 22, the fuse 64 acts as a memory so that if a collision has occurred which effects closure ofsensors
Claims (8)
- An air bag disabling system for an automotive vehicle having an ignition key cylinder operated by an ignition key having a plurality of bits and having an air bag (42,44) mounted in an instrument panel (10) in the vehicle and activated to inflate a cushioning bag in response to a condition sensed by an acceleration sensor (54,56) operatively carried with the vehicle, the disabling system comprising:a source of electrical power (50) mounted in the vehicle;a switch (52) electrically connected to said source of electrical power (50) and to the air bag (42,44) and selectively movable between a first position interconnecting said source of electrical power (50) and the air bag (42,44) to enable activation of the air bag and a second position preventing said activation; anda key cylinder (32) rotatably mounted in the instrument panel (10) and operatively connected to said switch (52) to effect movement of said switch between said first and second positions.
- A disabling system as claimed in claim 1, wherein said key cylinder (32) is operable by the vehicle ignition key.
- A disabling system as claimed in claim 1 or 2, further comprising a key (38) having a plurality of bits (40), at least certain of said bits (40) being identical with certain bits of the vehicle ignition key.
- A disabling system as claimed in any preceding claim, wherein the instrument panel (10) defines a main body portion (12) and said key cylinder is mounted in said main body portion.
- A disabling system as claimed in any of Claims 1 to 3, wherein the instrument panel defines a main body portion and said key cylinder is mounted below said main body portion.
- A disabling system as claimed in any preceding claim, further comprising a signal light (26) operatively connected to said switch (52) to effect visual indication of the position of said switch (52).
- A disabling system as claimed in claim 6, wherein the signal position (26) is positioned adjacent the key cylinder (32).
- A disabling system as claimed in claim 7, wherein said key (38) for the lock cylinder (32) has a handle portion (60) having substantially flat sides and said lock cylinder (32) is located with respect to said signal light (26) such that the flat sides of said handle portion (60) point substantially at said light (26) when said switch (52) is in said second position.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US36489094A | 1994-12-27 | 1994-12-27 | |
US364890 | 1994-12-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0719680A1 true EP0719680A1 (en) | 1996-07-03 |
EP0719680B1 EP0719680B1 (en) | 1999-04-21 |
Family
ID=23436541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19950308470 Expired - Lifetime EP0719680B1 (en) | 1994-12-27 | 1995-11-27 | Key activated air bag disabling system |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0719680B1 (en) |
DE (1) | DE69509204T2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0891899A1 (en) * | 1997-07-15 | 1999-01-20 | Trw Inc. | Timing circuit for air bag disable switch |
WO2000034085A1 (en) * | 1998-12-04 | 2000-06-15 | Ford Motor Company Limited | Airbag door including a state display for a switchable airbag system |
US6189923B1 (en) | 1998-02-13 | 2001-02-20 | Toyota Jidosha Kabushiki Kaisha | Manual cut-off system and method for passive safety devices |
US6371516B1 (en) | 1999-05-21 | 2002-04-16 | Toyota Jidosha Kabushiki Kaisha | Passenger-side airbag apparatus activation control system |
DE10226472B4 (en) * | 2002-06-14 | 2007-04-12 | Bayerische Motoren Werke Ag | Safety device for motor vehicles |
DE10014398B4 (en) * | 1999-03-23 | 2010-02-18 | Toyota Jidosha Kabushiki Kaisha, Toyota-shi | Airbag control device |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19960179B4 (en) * | 1999-12-14 | 2009-08-20 | Volkswagen Ag | Safety device for motor vehicles |
US6682094B1 (en) * | 2000-08-25 | 2004-01-27 | Ford Global Technologies, Llc | Restraint system |
DE10137266B4 (en) * | 2001-07-31 | 2010-11-04 | Volkswagen Ag | Switch mechanism for actuating at least one switching contact |
DE10216111B4 (en) * | 2002-04-12 | 2009-12-03 | GM Global Technology Operations, Inc., Detroit | Vehicle with a child seat arranged in the rear or front area |
DE102004022894B4 (en) * | 2004-05-10 | 2010-09-30 | GM Global Technology Operations, Inc., Detroit | Control for controlling safety systems of a motor vehicle |
DE102004022896A1 (en) * | 2004-05-10 | 2005-12-08 | Adam Opel Ag | Airbag controller for motor vehicle has warning unit, which activated when the air bag is switched off , is deactivated by operation of confirmation unit |
DE102004029628A1 (en) * | 2004-06-18 | 2006-01-05 | Adam Opel Ag | Airbag controller for front passenger seat airbag in motor vehicle enables output of either or both visual and aural warning when airbag is deactivated |
DE102004030952B4 (en) * | 2004-06-26 | 2012-11-29 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Monitoring system and method for a passenger airbag of a motor vehicle |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3767002A (en) * | 1972-08-10 | 1973-10-23 | A Gillund | Seat occupancy responsive air cushion actuation and monitoring circuit |
US5161820A (en) | 1990-05-23 | 1992-11-10 | Audi Ag | Inflatable air bag safety device for motor vehicles |
DE4237142A1 (en) * | 1991-10-28 | 1993-04-29 | Mitsubishi Electric Corp | Collision detector for vehicle equipped with airbag restraint - has manual switch preventing inflation of airbag, by inhibition of logic circuit which would otherwise respond to signal from accelerometer |
US5234228A (en) | 1991-02-12 | 1993-08-10 | Honda Giken Kogyo Kabushiki Kaisha | Air bag apparatus |
US5324074A (en) | 1991-11-07 | 1994-06-28 | Christian Ronald A | Airbag system |
-
1995
- 1995-11-27 DE DE1995609204 patent/DE69509204T2/en not_active Expired - Lifetime
- 1995-11-27 EP EP19950308470 patent/EP0719680B1/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3767002A (en) * | 1972-08-10 | 1973-10-23 | A Gillund | Seat occupancy responsive air cushion actuation and monitoring circuit |
US5161820A (en) | 1990-05-23 | 1992-11-10 | Audi Ag | Inflatable air bag safety device for motor vehicles |
US5234228A (en) | 1991-02-12 | 1993-08-10 | Honda Giken Kogyo Kabushiki Kaisha | Air bag apparatus |
DE4237142A1 (en) * | 1991-10-28 | 1993-04-29 | Mitsubishi Electric Corp | Collision detector for vehicle equipped with airbag restraint - has manual switch preventing inflation of airbag, by inhibition of logic circuit which would otherwise respond to signal from accelerometer |
US5324074A (en) | 1991-11-07 | 1994-06-28 | Christian Ronald A | Airbag system |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0891899A1 (en) * | 1997-07-15 | 1999-01-20 | Trw Inc. | Timing circuit for air bag disable switch |
US6189923B1 (en) | 1998-02-13 | 2001-02-20 | Toyota Jidosha Kabushiki Kaisha | Manual cut-off system and method for passive safety devices |
WO2000034085A1 (en) * | 1998-12-04 | 2000-06-15 | Ford Motor Company Limited | Airbag door including a state display for a switchable airbag system |
DE10014398B4 (en) * | 1999-03-23 | 2010-02-18 | Toyota Jidosha Kabushiki Kaisha, Toyota-shi | Airbag control device |
US6371516B1 (en) | 1999-05-21 | 2002-04-16 | Toyota Jidosha Kabushiki Kaisha | Passenger-side airbag apparatus activation control system |
DE10226472B4 (en) * | 2002-06-14 | 2007-04-12 | Bayerische Motoren Werke Ag | Safety device for motor vehicles |
Also Published As
Publication number | Publication date |
---|---|
DE69509204T2 (en) | 1999-08-19 |
DE69509204D1 (en) | 1999-05-27 |
EP0719680B1 (en) | 1999-04-21 |
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